diff --git a/tests/test-mtree.c b/tests/test-mtree.c
index 92b20b6a..b6fec796 100644
--- a/tests/test-mtree.c
+++ b/tests/test-mtree.c
@@ -293,6 +293,36 @@ static void test_basic(void)
     tree_get_str(s, t, false);
     assert(string_equal_str_p(s, "[{0,[{-1,[{3}]},{2,[{1,[{5}]}]}]}]"));
 
+    int data = 10;
+    tree_move_up(it2, &data);
+    tree_get_str(s, t, false);
+    assert(string_equal_str_p(s, "[{0,[{-1,[{3}]},{10,[{2,[{1,[{5}]}]}]}]}]"));
+    assert(data == 0);
+
+    data = 11;
+    tree_move_left(it2, &data);
+    tree_get_str(s, t, false);
+    assert(string_equal_str_p(s, "[{0,[{-1,[{3}]},{10,[{11},{2,[{1,[{5}]}]}]}]}]"));
+    assert(data == 0);
+
+    data = 12;
+    tree_move_right(it2, &data);
+    tree_get_str(s, t, false);
+    assert(string_equal_str_p(s, "[{0,[{-1,[{3}]},{10,[{11},{2,[{1,[{5}]}]},{12}]}]}]"));
+    assert(data == 0);
+
+    data = 13;
+    tree_move_child(it2, &data);
+    tree_get_str(s, t, false);
+    assert(string_equal_str_p(s, "[{0,[{-1,[{3}]},{10,[{11},{2,[{13},{1,[{5}]}]},{12}]}]}]"));
+    assert(data == 0);
+
+    data = 14;
+    tree_move_down(it2, &data);
+    tree_get_str(s, t, false);
+    assert(string_equal_str_p(s, "[{0,[{-1,[{3}]},{10,[{11},{2,[{14,[{13},{1,[{5}]}]}]},{12}]}]}]"));
+    assert(data == 0);
+
     tree_it_set(&it, root);
     assert(tree_it_equal_p(it, root));